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Model 86 Trouble Shooting Guide
Problem
evidence
Solution(s)
Low humidity
Low water level
Turn thermostat up to activate heat blower opera-
(less than 2" deep tion, then check the following:
in reservoir)
• Turn adjustment screw counterclockwise (
) to
raise water level.
No water in reser-
• Turn water on at saddle valve.
voir
• Turn off water main and check for possible
obstruction in saddle valve or float valve.
Drum not rotating
• Set humidistat higher.
• Check for blown circuit breaker.
• Turn thermostat up to activate heat and blower
operation.
• Check all wiring connections.
• Check output voltage on transformer (24 to 29
V.A.C.).
• Test motor by connecting good transformer to
motor leads. (NOTE: Disconnect humidistat from
circuit.)
• Check humidistat for continuity.
• Check to see that the drum shaft is engaged
with motor drive coupling.
• Clean excessive mineral deposits off drum.
Heavy mineral
Mineral buildup on the pad closes off pores and
buildup
restricts airflow.
• Clean or replace the evaporative pad as indi-
cated in the maintenance instructions.
Short blower
De-rating the furnace causes it to run longer on
cycles
less fuel, and causes the humidifier to produce
more moisture.
• Call your HVAC contractor.
Drafts
Drafts are caused by rapid air changes in the
home.
• Keep doors and windows closed.
• Close fireplace damper when not in use.
• Keep exhaust fan running times to a
minimum.
• Seal around doors and windows to prevent
added cold, dry air from overburdening your
humidifier.
High humidity
Heavy conden-
This may be a temporary condition caused by
sation on windows bathing, cooking, mopping, etc.
• Turn humidistat down enough to eliminate con-
densation.
Condensation on
• Turn humidistat and water supply off until con-
walls
densation is completely evaporated.
Humidifier over-
High or overflow-
• Inspect valve seat for defects. (Valve seat is
flows
ing water
reversible—reverse or replace.)
• Inspect valve nozzle for cracks or erosion.
• Make sure humidifier is level.
